Intellectual Property India Publishes Patent Application for Fuzzy Logic Based Adaptive Direct Torque Control System For High-Performance Squirrel-Cage Induction Motor Drives

MUMBAI, India, Oct. 5 -- Intellectual Property India has published a patent application (202611101352 A) filed by Mr. Hitendra Kumar Singh; Dr. Puneet Khanna; Mr. Sharad Chaudhary; Mrs. Bhavna Rani; Dr. Jasvir Singh Rana; Ms. Priyanka Upadhyay; Ms. Sweta Gupta; Mr. Gaurav Pandey; Mr. Rahul Singh; and Dr. Rahul Gupta on August 21, 2026, for Fuzzy Logic Based Adaptive Direct Torque Control System For High-Performance Squirrel-Cage Induction Motor Drives.

Inventors include Mr. Hitendra Kumar Singh; Dr. Puneet Khanna; Mr. Sharad Chaudhary; Mrs. Bhavna Rani; Dr. Jasvir Singh Rana; Ms. Priyanka Upadhyay; Ms. Sweta Gupta; Mr. Gaurav Pandey; Mr. Rahul Singh; and Dr. Rahul Gupta.

The application for the patent was published on October 02, 2026, under issue no. 40/2026.

Abstract: The present invention relates to an adaptive control system for a squirrel-cage induction motor drive. The system comprises a voltage-source inverter, sensing arrangement, stator-flux estimation unit, electromagnetic torque estimation unit, adaptive fuzzy logic speed controller, Direct Torque Control processor, and switching- vector selection unit. The adaptive fuzzy logic speed controller receives speed error and change in speed error and generates an adaptive torque reference or torque- reference correction according to the instantaneous operating condition of the motor. The Direct Torque Control processor determines torque error, stator-flux error, and stator-flux sector and selects an appropriate inverter voltage vector. The selected voltage vector is applied to the induction motor through the voltage-source inverter. The closed-loop adaptive control architecture is configured to improve speed regulation and dynamic response and to reduce undesirable torque and flux fluctuations under varying speed and load conditions. The invention is applicable to industrial variable-speed drives including pumps, compressors, conveyors, fans, machine tools, robotic systems, electric transportation systems, and other induction-motor applications.

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